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How sealed are they?
I got an 87 vintage road bike that has a "sealed bearing" marked on the hubs. I'm just wondering if its okay to use the bike or repack the bearings first?
' seems to spin freely with no drag.

How sealed are they?
I got an 87 vintage road bike that has a "sealed bearing" marked on the hubs. I'm just wondering if its okay to use the bike or repack the bearings first?
' seems to spin freely with no drag.

Thanks in advance!

Most of what I've encountered have been conventional cup-and-cone ball bearing hubs with seals on the dustcaps. At a minimum, I'd probably pull a cone off to look at it and put a dollop of fresh grease in it. If the grease was old, I'd take it all apart and clean everything before putting in new bearings and grease. It'd be good for another 20 years.

Hi, most wheels marked sealed bearing were the cartridge style sealed bearings pressed into the hubs. As apposed to hubs marked sealed mechanism usually were loose ball bearings with some type of o ring seal on the axle cone or on the hubs dust shield. To know for sure and if both wheels are the same hub then take the front apart to inspect and confirmed sealed or not. If not then I would re grease and put in new bearings using a waterproof or lithium grease just to start fresh. Not auto wheel bearing grease. Good luck.

If the hub really has cup-and-cone bearings and it hasn't been serviced since new, I definitely would overhaul, clean and add new grease to it.

I once got a '86 vintage bike from my brother that hadn't been ridden in about 15 years and the grease (hubs, headset and bottom bracket) had dried out to the consistancy of dry rubber cement. The hubs felt ok when turned by hand but would have been ruined by riding them in that condition.

Even cartridge bearings can be relubed, particularly if they are open bearings but even if they are sealed, the seals can be pried up and fresh grease added.

Hi, most wheels marked sealed bearing were the cartridge style sealed bearings pressed into the hubs. As apposed to hubs marked sealed mechanism usually were loose ball bearings with some type of o ring seal on the axle cone or on the hubs dust shield. To know for sure and if both wheels are the same hub then take the front apart to inspect and confirmed sealed or not. If not then I would re grease and put in new bearings using a waterproof or lithium grease just to start fresh. Not auto wheel bearing grease. Good luck.

I worked on plenty that were marked "Sealed Bearing" and were cup-and-cone bearings. The only way to really tell is to take the hub apart.